I just remove mods before going to dealer... The ER intake will not work on the X1 as far as I know also. The E84 and the F30 have different air boxes and plumbing and the engine bays are different so mounting points will vary

Hmm good point since one is sedan and one is SAV.

What about your aFe drop in filter, does it add more hp/torque or decreased accel lag?

Also, i believe that bmw built in computer will record everything when you mod the cables, do the dealer will notice these mods even if the JB is removed during service?